What are the side effects and contraindications of mugwort tea?

Mugwort tea has the effect of warming menstruation and relieving pain, etc. Overdose can appear convulsions, delirium, vomiting, dizziness, paralysis and other adverse reactions, Yin deficiency and blood-heaters should be cautious.
Wormwood is warm in nature, taste hard, and has a small poison. It has the efficacy of dispersing cold and relieving pain, regulating menstruation, tranquilizing the fetus, warming menstruation and stopping bleeding.
It can be used in treating cold pain in the epigastrium (cold pain in the stomach and abdomen), irregular menstruation, fetal leakage (small amount of vaginal bleeding in early pregnancy), hemorrhage, infertility due to cold uterus, excessive menstruation, restlessness of the fetus, epistaxis, and metrorrhagia (excessive menstrual flow or dribbling), etc. It is also used in treating the symptoms of diarrhea and dysmenorrhea.
People with yin deficiency and blood heat should be cautious in taking mugwort, overdose of this product may cause convulsions, delirium, nausea, vomiting, tinnitus, dizziness, tremor of limbs, generalized weakness, paralysis and other adverse reactions.
Mugwort is often decocted as a medicine and has limited utility as a tea substitute. It is recommended to consult a doctor as soon as possible if you feel unwell, and to take wormwood under a doctor’s supervision.